From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).
Cost breakdown for various test rigs.
| Identifier | ExFiles\Box 148\2\ scan0226 | |
| Date | 8th August 1939 | |
| 8.8.39. TEST RIG COSTS. Total £. £. Variable Speed Bump Rig at Shardlow. Crofts gear. 140 Coronation Jack. 110 Installation ) 100 rewinding motor) 350 Shock Damper Rig. Reduction 1500 r.p.m. - 210 r.p.m. 13 Reduction 3 - 1, 1 - 3. 36 Motor 3 H.P. 1500 r.p.m. 3 p. 15 Starter 15 Installation 17 96 Bearing Rig. Motor 1 H.P. 3,000 r.p.m. 6 Starter (not elaberate) 2 Frame 5 13 Olsem Spring Test Machine. 451 451 Wheel Testing Rig. Motor 5 H.P. 20 Starter 20 Frame 20 60 | ||